-LRB- CNN -RRB- -- The man who police say plowed his vehicle into a California Walmart , where he then attacked several customers , was booked Monday on four counts of assault with a deadly weapon and resisting arrest .

Haamid Zaid , 33 , of Seaside , California , is suspected of having been under the influence of drugs , but the motive is under investigation , according to Albert Morales , an officer with the San Jose Police Department .

`` Once Mr. Zaid emerged from the vehicle , he used some type of metal object to attack people , '' Morales said of the Sunday incident at the San Jose store .

The suspect was later subdued by a group of customers until police arrived , he said

One of the victims , a 61-year-old man , was transported to an area hospital . The injury was considered serious but not life-threatening .

Three other unidentified victims were treated for injuries at the scene and released , authorities said .

Detectives are reviewing surveillance video to help determine how the vehicle plowed into the store and whether the crash was intentional .

Police : Man plows vehicle into a Walmart , assault customers

CNN 's Scott Thompson contributed to this report

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A man plowed his vehicle into a San Jose Walmart on Sunday , police say

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Haamid Zaid , 33 , of Seaside , California , faces four counts of assault with a deadly weapon

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A 61-year-old man was transported to a hospital with a serious injury